This mount provides the most rugged see through capability on the market and mounts the scope as low as possible while still allowing iron sight use on AR15/M16 rifles. The mounts are solid, one piece heat treated aluminum alloy which is first extruded and then machined on the finest American made computer controlled machining centers. This provides an iron sight usable option to shooters who do not care for the typical "figure eight" style see through ring/mounts. The "Second Sight" see through base accepts most brands of standard scope rings and all electronic sights.